BTW you said that the engine is from a Chevy. Can you be more specific which one? 720HP on the dynamometer...
He mentioned that it was a 572 big block in his post:
Has a 572 crate engine from chevy
The 572 is rated at 727 HP, so I believe him when he says the dynamometer rated the car at 720 (source:
https://www.chevrolet.com/performance/crate-engines/big-block-zz-572-720-r).
Because i saw it,i ask. I didnt say that i dont believe this but as you post is from a brand new 572 Chevy crate engine,from the official site of Chevy.
I'm more than sure that the engine that Op mention is not a brand new. Plus,where is the pics?